This has been bothering me for a while now. GTK apps seem to crash unexpectedly on my sparc boxes (an Ultra 5 and Ultra 60):

Code:

$ audacious
The program 'audacious' received an X Window System error.
This probably reflects a bug in the program.
The error was 'RenderBadPicture (invalid Picture parameter)'.
(Details: serial 56898 error_code 175 request_code 154 minor_code 6)
(Note to programmers: normally, X errors are reported asynchronously;
that is, you will receive the error a while after causing it.
To debug your program, run it with the --sync command line
option to change this behavior. You can then get a meaningful
backtrace from your debugger if you break on the gdk_x_error() function.)

Audacious usually causes the error quickly, but firefox and gkrellm are affected as well.